Jokn g



@tutti lililw JOHN G gSTREET, OF BROOKLYN, NEW YORK.

Laim Patent N0.f102,447, dated April 26,1870;

IMPROVEMENT IN MACHINE-Baume.

The Schedule' referred to in these Letters Patent and making of the same.

To all whom it may concern.:

' Be it known that I, J oHN G. STREET, of' Brooklyn, in the county of Kings and State of NewYork, have invented a new and improved Machinery belt; and I do hereby declare that the following is a full and exact description thereof', reference being had to the ac-` companying drawings and to the lettersJof reference marked thereon, making a part of this specification'.

The object oi' this invention is to so produce a machinery belt as will not only have great strength, but at the same time readily adapt itself to the pulley around which it is used, besides being constructed at much less cost than ordinary belting. l

In the accompanying sheet of drawings- Figure l is a plan or top viewof the leather' coil;

Figure 2, a sectional view of my belt after passing through the first pair of rolls; v l

Llllgure, a sectional view ofthe heltwhen finished; an L Figure 4, the belt applied to a pulley, (two views.)

Similar' letters of reference indicate corresponding parts in' the several drawings.

" A represents a coil of leather whichhas been cut roma lside of leather of any desired quality. The

-Width of the strip forming this coil will .depend upon the width or size of the belt-it is desired to make, as, for instance, a quarter-inch lbelt would require the strip lto be one-half inch wide, 85o.

The coil, having been thus formed, is passed between a pair of cast-iron rolls, the under roll having formed therein a half-round groove, and the upper roll being constructed with a projecting rib, of such sile as will iit into the half-round groove of the under ro 'lfhelstrip of leather forming the coil A being thus v passed between said rollers, the sides or edges b c thereof are folded together in the shape of-'the letter U, and the coil is straightened into along and Vcontinnous strip; This strip is then passed through a second pair of rolls, the under one of which, havinga halt` round groove, and the upper onel a-plain surface. This last rolling forces the two sides b c of the strip of leather closely together,-thus forming the belt-.the under side of which is convex, and the top side plane, or, in other words, a'half-round belt.`

The advantages .of this belt over a round beware,A that a round belt will only iit, particularly after it isa little worn,vto the lower-side 'ofthe grooveA inthe' e pulley whereonit runs, thus rendering the belt liable to slip," resulting in a loss'of powerwhereas with my belt it will be observe'dthat the groove in the pulley' is closely tted at all times by the belt, an'd thus increased power is obtained; besides, a belt constructedA as the one hereinbefore described'is extremelystrong, v

and will not' twist, as will an ordinary round belt, and

hence`will not cnt out so soon'.. And another import# vaut advantage vin my belt is that, asit, wears in the course of time, the sides of the-belt, from its peculiarl construction, lwill Qpen,'and thus alwaysill the groove of the pulley and vmaintain the full power as long as the belt lasts. v

.Having thus described 'my invention,

What I claim` as new' and desire-to secure by Let-v v ters Patent, isy A. half-round machinery belt, constructed as and for the purposes herei'nbefore'described.

' JOHN G. STREET.

, '.Witnesses:

H. L. WATTENBERG,

G. M. PLYMPTO'N. 

